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CallonDoc vs Function Health: Which Is Better?

Head-to-head comparison of CallonDoc and Function Health based on our independent scoring across trust, value, experience, product range, and reputation — plus real pricing for the treatments they both offer.

Our Verdict

CallonDoc scores higher overall in our independent evaluation (78.4/100 vs 76.3/100), leading on product range. Function Health comes out ahead on trust & safety.

78
CallonDoc
Very Good

CallonDoc is a Dallas-based async telehealth platform offering flat-rate, form-based consults across urgent care, STD, women's and men's health, mental health, and dermatology without requiring insurance.

Visit CallonDoc
76

Direct-to-consumer lab testing membership offering 160+ biomarkers twice yearly through Quest Diagnostics, with clinician-reviewed results and action plans.

Visit Function Health

Score Breakdown

DimensionCallonDocFunction Health
Overall Score78.4/100 ✓76.3/100
Trust & Safety30%75/10078/100 ✓
Value25%80/10080/100
Experience20%82/10082/100
Product Range15%80/100 ✓60/100
Reputation10%75/10075/100

At a Glance

Founded20172021
HeadquartersDallas, TXAustin, TX
Publicly tradedNoNo
Treatment categories31
Treatments listed32
Starting price$24.99/mo$49/mo

Pricing Where They Compete

Prices shown are based on our most recent research and may not reflect current pricing. Telehealth providers update their pricing frequently. Always verify pricing directly with the provider before purchasing.

CategoryCallonDocFunction Health
Primary Care$24.99–$49.99
Subscribe & Save Membership
$49–$99
At-Home Blood Draw Add-On

CallonDoc

+Posted flat-rate pricing (roughly $40-$60) visible before starting a consult, no insurance needed
+Broad condition coverage spanning primary care, STD, dermatology, mental health, and men's/women's health
+Fast prescription turnaround, typically within about two hours to a local pharmacy
−Most visits are async/form-based rather than live video, which may not suit patients who want to speak with a clinician directly
−A meaningful minority of reviewers report prescription delivery delays or friction resolving billing/admin issues
−Condition list is broad enough that depth of care for complex or chronic issues may lag specialist telehealth brands
Read the full CallonDoc review →

Function Health

+Trustpilot rating of 4.5/5 across 2,960 reviews, among the strongest in the diagnostics-membership category
+160+ biomarkers tested twice yearly at 2,000+ Quest locations nationwide, far exceeding a standard annual physical (roughly 20-30 markers)
+Flat, transparent annual pricing ($365/year) visible before any intake or consult
−Reaching live customer support can be slow, per patient reports
−Results depend on Quest blood-draw logistics; a subset of patients report an inconsistent draw experience
−Membership covers testing and clinician-reviewed insights but not ongoing prescribing or treatment for abnormal results
Read the full Function Health review →

CallonDoc vs Function Health — FAQ

Is CallonDoc better than Function Health?

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CallonDoc scores higher overall in our independent evaluation (78.4/100 vs 76.3/100), leading on product range. Function Health comes out ahead on trust & safety.

Is CallonDoc or Function Health cheaper?

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CallonDoc has the lower starting price (from $24.99/mo vs $49/mo for Function Health). Starting prices are for the cheapest treatment each offers — compare the specific treatment you need, and check what each price includes.

What do CallonDoc and Function Health both offer?

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Both platforms treat Primary Care. CallonDoc covers 3 treatment categories total and Function Health covers 1.

Still deciding?

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